The City of Toronto had renovated Exhibition Stadium to accommodate Major League Baseball (MLB), in anticipation of the Giants relocating there, and continued to push for an MLB franchise. MLB awarded the City of Toronto an expansion franchise in 1976, along with Seattle, Washington. A consortium composed of Labatt Breweries (45%), Webster (45%) and CIBC (10%), purchased the rights for the franchise from MLB for $7 million.[6][4][7]

However, even after the franchises were awarded, the future of baseball in Toronto appeared uncertain. U.S. PresidentGerald Ford had attempted to put pressure on MLB to give Washington, D.C. an expansion franchise instead of Toronto.[8] Washington had been without Major League Baseball since the Senators were moved to Arlington, Texas to become the Texas Rangers following the 1972 season. Following this development there was brief speculation by Metro Toronto chairman Paul Godfrey,[4] among others, that Washington would be awarded Toronto's American League franchise and Toronto would instead be awarded a National League expansion franchise. However, Ford's attempts did not amount to anything and Toronto was allowed to keep its American League expansion franchise.

The franchise's first employee was Paul Beeston, who began work in 1976 as the vice president of business operations. Beeston would later serve as president of the Blue Jays and MLB; he eventually returned to the Blue Jays in 2008, as president. Before the team's inaugural season in 1977, Peter Bavasi was chosen as the general manager, and Pat Gillick was assistant general manager.

The name "Blue Jays" came about when the team held a "name the team" contest in 1976, which involved more than 4,000 suggestions.[9] "Blue Jays" was chosen by majority owner Labatt Breweries--an apparent tie-in with its feature brand, Labatt Blue. However, it is very likely that the team would have used blue as one of its colours in any event; blue has been the primary colour for Toronto's top-level teams since the Toronto Argonauts adopted it in 1873.

The Blue Jays played their first game on April 7, 1977, against the Chicago White Sox, before a home crowd of 44,649. The game is now perhaps best remembered for the minor snowstorm which began just before the game started. Toronto won the snowy affair 9–5, led by Doug Ault's two home runs. That win would be one of only 54 of the 1977 season, as the Blue Jays finished in last place in the AL East, with a record of 54–107. After the season, Gillick became general manager of the team, a position he would hold until 1994.

In 1978, the team improved their record by five games, but remained last with a record of 59–102. In 1979, after a 53–109 last place finish, shortstop Alfredo Griffin was named American League co-Rookie of the Year. In addition, the Blue Jays' first mascot, BJ Birdy, made its debut in 1979.

In 1980, Bobby Mattick became manager, succeeding Roy Hartsfield, the Blue Jays' original manager. Mattick began the 1980 season with the goal of losing fewer than 100 games for the first time in the team's brief history. For a brief time during the early part of the season, the surprising young Jays actually battled with the New York Yankees for first place in the AL East, before they tumbled during the summer back to the bottom of the standings. Still, the Jays almost reached the 70-win mark, finishing with a record of 67–95, a 14-win improvement on 1979, and achieving Mattick's goal of fewer than 100 losses. Jim Clancy led with 13 wins and John Mayberry became the first Jay to hit 30 home runs in a season.

In the strike-divided season of 1981, the Jays again finished in last place in the American League East, in both halves of the season. They were a dismal 16–42 in the first half, but improved dramatically, finishing the 48-game second half at 21–27, for a combined record of 37–69.

Under new manager Bobby Cox, Toronto's first solid season came in 1982 as they finished 78–84. Their pitching staff was led by starters Dave Stieb, Jim Clancy and Luis Leal, and the outfield featured a young Lloyd Moseby and Jesse Barfield. 1982 was also the Blue Jays' first season in which they were not worse than every other team in their division, as they tied Cleveland for sixth place. First baseman Willie Upshaw became the first Blue Jay to have at least 100 RBIs in a season.

In 1983, the Jays would make an even bigger breakthrough, leading the AL East for most of the summer (including at the All-Star break) before tailing off during August and September; in the end, the club did compile their first winning record, 89–73, finishing in fourth place, 9 games behind the eventual World Series champions, the Baltimore Orioles. It would be the first of 11 straight winning seasons for the team.

The Blue Jays' progress continued in 1984, finishing with the same 89–73 record, but this time in a distant second place behind another World Series champion, the Detroit Tigers. After 1984, Alfredo Griffin went to the Oakland Athletics, thus giving a permanent spot to young Dominican shortstop Tony Fernández, who would become a fan favourite for many years.

In 1985, Toronto won their first championship of any sort: the first of their five American League East division titles. The Blue Jays featured strong pitching and a balanced offense. Their mid-season call up of relief pitcher Tom Henke also proved to be important. They finished 99–62 (the franchise record for most wins), two games in front of the New York Yankees. The Blue Jays faced the Kansas City Royals in the American League Championship Series (ALCS), and took a 3 games to 1 lead. However, Kansas City won three consecutive games to win the series 4 games to 3, on their way to their first, and only, World Series championship to date.

In 1987, the Blue Jays lost a thrilling division race to the Detroit Tigers by two games, after being swept on the last weekend of the season by the Tigers, ending the season with 7 straight losses. The Blue Jays finished with a 96–66 record, second best in the major leagues, but to no avail. However, George Bell was named Most Valuable Player (MVP) of the American League, the only Blue Jay to be named so.

In 1988, however, Toronto could not duplicate the successes of the previous season, tying the Milwaukee Brewers for third in the division at 87–75. Still, the season had numerous highlights. First baseman Fred McGriff hit 34 home runs, and Dave Stieb had back-to-back starts in which he lost a no-hitter with two out and two strikes in the ninth inning.

In 1989, the Blue Jays' new retractable roofed home, SkyDome, opened in the mid-season. It also marked the beginning of an extremely successful five-year period for the team. In May, management fired manager Jimy Williams and replaced him with Cito Gaston, the team's hitting instructor. The club had a dismal 12–24 record at the time of the firing, but went 77–49 under Gaston to win the American League East title by two games. On May 28, 1989, the Blue Jays played their final game at Exhibition Stadium against the Chicago White Sox, who coincidentally were the Blue Jays' opponents in their first game in franchise history, at the same stadium, twelve years earlier; the Blue Jays won 7–5 in 10 innings. The first game at the new stadium took place on June 5 against the Milwaukee Brewers, which the Jays lost 5–3. In the 1989 American League Championship Series, Rickey Henderson led the Oakland Athletics to a 4–1 series win.

Carter, Alomar and White would prove to be extremely effective additions, as the Blue Jays again won the division in 1991, as Carter drove in the division winning run. Once again, however, they fell short in the postseason, losing to the Minnesota Twins, who were on their way to their second World Series victory in five seasons, in the ALCS. In 1991, the Blue Jays became the first Major League club ever to draw over four million fans in one season. In early November 1991, Labatt announced that it had acquired the 45% ownership stake in the team held by Webster's estate for $67.5 million, giving it 90% of the club with CIBC owning the renaming 10%.[10][11]

After the 1991 season had ended, the Blue Jays acquired pitcher Jack Morris, who had led the Minnesota Twins to victory in the World Series by pitching a 10-inning complete gameshutout in Game 7 and had been named the World Series MVP. To add veteran leadership to their explosive offense, Toronto signed future Hall of Famer Dave Winfield to be the team's designated hitter.

The 1992 regular season went well, as the Jays clinched their second straight AL East crown with a final record of 96–66, four games ahead of the Milwaukee Brewers. They also went the entire season without being swept in any series. The Blue Jays met the Oakland Athletics (who had the same record as the Jays and led the division by six games over the defending champion Twins) in the ALCS, winning 4 games to 2. The pivotal game of the series was Game 4, considered by many to be one of the most important games in Blue Jays history: the Blue Jays rallied back from a 6–1 deficit after seven innings, capped off by Roberto Alomar's huge game-tying 2-run homer off Hall of Fame A's closerDennis Eckersley in the top of the ninth. This paved the way for a 7–6 victory in 11 innings, a 3 games to 1 lead in the series and an eventual 4–2 ALCS series win.

The Blue Jays then faced the Atlanta Braves in the World Series. The pivotal game in this series turned out to be Game 2, in which reserve player Ed Sprague hit a 9th-inning 2-run home run off Braves closer Jeff Reardon to give the Blue Jays a 5–4 lead, which would hold up. After winning Game 3 thanks to Candy Maldonado's ninth inning RBI hit and Game 4 due to Jimmy Key's superb 71⁄3 inning pitching effort in which he retired 15 straight batters (five innings), the Jays could not win the Series on home turf as the Braves struck back with a 7–2 win in Game 5. Game 6 in Atlanta, with the Blue Jays leading 3 games to 2, was a very close game. Toronto was one strike away from winning in the bottom of the 9th inning, 2–1,[12] but Otis Nixon singled in the tying run off the Blue Jays' closer Tom Henke. It was the first run the Toronto bullpen had given up in the series. The game was decided in the 11th inning, when Dave Winfield doubled down the left-field line, driving in two runs. The Braves would again come within one run in the bottom of the 11th, but Jays reliever Mike Timlin fielded Otis Nixon's bunt, throwing to Joe Carter at first base for the final out. The Blue Jays became the first team based outside of the United States to win the World Series. Pat Borders, the Jays' catcher, was the unlikely player who was named MVP after hitting .450 with one home run in the World Series. Oddly, Morris was acquired in large part for his reputation as a clutch postseason pitcher, but he went 0–3 in the playoffs. Morris, however, pitched well in the regular season, becoming the Blue Jays' first 20-game winner, with a record of 21–6 and an ERA of 4.04.

After the 1992 season, the Blue Jays let World Series hero Dave Winfield and longtime closer Tom Henke go but signed two key free agents: designated hitter Paul Molitor from the Milwaukee Brewers and perennial playoff success Dave Stewart from the Oakland Athletics.

In 1993, the Blue Jays had seven All-Stars: outfielders Devon White and Joe Carter, infielders John Olerud and Roberto Alomar, designated hitter Molitor, plus starting pitcher Pat Hentgen, and closer Duane Ward. In August, the Jays acquired former nemesis Rickey Henderson from the Athletics. The Blue Jays cruised to a 95–67 record, one less win than 1992 and seven games ahead of the New York Yankees, winning their third straight division title. The Jays beat the Chicago White Sox 4 games to 2 in the ALCS, and then the Philadelphia Phillies, 4 games to 2, for their second straight World Series victory. The World Series featured several exciting games, including Game 4, played under a slight rain, in which the Blue Jays came back from a 14–9 deficit to win 15–14 and take a 3 games to 1 lead in the series. It remains the highest scoring game in World Series history. Game 6 in Toronto saw the Blue Jays lead 5–1, but give up 5 runs in the 7th inning to trail 6–5. In the bottom of the 9th inning Joe Carter hit a one-out, three-run walk-off home run to clinch the series, off Phillies closer Mitch Williams. This is the only time in the history of Major League Baseball that a team hit a walk-off home run while trailing in the bottom of the 9th inning to win the World Series. The home run is also memorable for late Blue Jays broadcaster Tom Cheek's call:

A swing, and a belt! Left field! Way back! Blue Jays win it! The Blue Jays are World Series champions as Joe Carter hits a three-run home run in the ninth inning and the Blue Jays have repeated as World Series champions! Touch 'em all, Joe, you'll never hit a bigger home run in your life!

Expectations were high for the Blue Jays for the 1994 season, following back-to-back championships, but they slumped to a 55–60 record and a third-place finish (16 games back of the New York Yankees) before the players' strike. It was their first losing season since 1982. Joe Carter, Paul Molitor and John Olerud enjoyed good years at the plate, but the pitching fell off. Juan Guzmán slumped considerably from his first three years (40–11, 3.28 ERA), finishing 1994 at 12–11 with a 5.68 ERA. Three young players, Alex Gonzalez, Carlos Delgado and Shawn Green, did show a lot of promise for the future.

Before the 1995 season, Pat Gillick, the longtime Blue Jays general manager, resigned and handed the reins of the team to Toronto native Gord Ash, who would lead the team in its most tumultuous era yet.

In the 1995 season, the Blue Jays proved that they had lost their contending swagger of the past 12 years. Although they had most of the same cast of the World Series teams, the Blue Jays freefell to a dismal 56–88 record, last place in the AL East, 30 games behind the Boston Red Sox. Attendance also tailed off dramatically during the 1995 season, and has never recovered since. During SkyDome's first four-plus seasons, Blue Jays tickets were among the toughest in all of baseball. While attendance suffered throughout the majors in the years immediately after the strike, the dropoff was especially pronounced for the Canadian teams, the Montreal Expos and Blue Jays.

Labatt Breweries was bought by Belgian-based brewer Interbrew (now InBev) in 1995,[13][14] making the Blue Jays the second baseball team owned by interests outside of North America. Interestingly, the first was the Blue Jays' expansion cousins, the Mariners, owned by Nintendo.

1996 was another mediocre year for the Blue Jays, despite Pat Hentgen's Cy Young Award (20–10, 3.22 ERA). Ed Sprague had a career year, hitting 36 home runs and driving in 101 runs. However, their 74 wins did put them in 4th place, improving over their last place finish in 1995. They improved their record by 18 victories as they played the full 162 game schedule for the first time since 1993.

The Blue Jays started 1997 with high hopes. Not only did the Jays drastically change their uniforms, they signed former Boston Red Sox ace Roger Clemens to a $24,750,000 contract. Clemens had one of the best pitching seasons ever as he won the pitcher's Triple Crown, leading the American League with a record of 21–7, a 2.05 ERA, and 292 strikeouts. This was not enough to lead the Blue Jays to the postseason, however, as they finished in last place for the second time in three years with a record of 76–86. Cito Gaston, the longtime manager who led the team to 3 division titles and 2 World Series crowns, was fired five games before the end of the season.

Before the start of the 1998 season, the Blue Jays acquired closer Randy Myers and slugger Jose Canseco. Gaston was replaced with former Blue Jay Tim Johnson, a relative unknown as a manager. Despite mediocre hitting, strong pitching led by Clemens' second straight pitching Triple Crown (20–6, 2.65 ERA, 271 strikeouts) sparked the Blue Jays to an 88–74 record – their first winning season since 1993. However, this was only good enough to finish a distant third, 26 games behind the New York Yankees, who posted one of the greatest records in all of baseball history at 114–48. They were, however, in contention for the wildcard spot until the final week.

Before the 1999 season, the Blue Jays traded Clemens to the Yankees for starting pitcher David Wells, second baseman Homer Bush and relief pitcher Graeme Lloyd. They also fired manager Tim Johnson during spring training after he lied about several things (including killing people in the Vietnam War) in order to motivate his players. The Blue Jays had initially been willing to stand by Johnson. A blizzard of questions about his credibility during spring training, however, led Ash to fire him less than a month before opening day. Johnson was replaced with Jim Fregosi, who managed the Phillies when they lost to the Blue Jays in the 1993 World Series. The offense picked up somewhat in 1999, but the pitching suffered without Clemens, as the Blue Jays finished at 84–78, in third place. After the 1999 season, the Blue Jays' original mascot for 20 years, BJ Birdy, was replaced by a duo named Ace & Diamond.

2000 proved to be a similar season, as the Jays had an 83–79 record, well out of the wild card race but only a slim 4½ games back of the three-time defending World Series Champion Yankees in the AL East, the first time since 1993 they had contended for the division. Carlos Delgado had a stellar year, hitting .344 with 41 home runs, 57 doubles, 137 RBI, 123 walks and 115 runs. In addition, six other players hit 20 or more home runs, an outstanding feat. José Cruz Jr., Raúl Mondesí, Tony Batista, Darrin Fletcher, Shannon Stewart, and Brad Fullmer all contributed to the powerful heart of the lineup.

On September 1, 2000, Rogers Communications Inc. announced that it had purchased 80% of the baseball club for $168 million with Interbrew (now InBev) maintaining 20% interest and the Canadian Imperial Bank of Commerce relinquishing its 10% share.[13][14] Rogers would acquire the remaining 20% owned by Interbrew in January 2004 for $45 million,[15][16] and currently owns 100% of the team.

Buck Martinez, a former catcher and broadcast announcer for the Blue Jays, took over as manager before the 2001 season. The Blue Jays were back under .500 for 2001, finishing at 80–82, with mediocre pitching and hitting. Delgado led the team again with 39 home runs and 102 RBI. After the 2001 season ended, the Blue Jays fired Gord Ash, ending a seven-year tenure as general manager.

The Blue Jays' struggles were further aggravated by an extremely unfavourable currency exchange rate. In the early 2000s, the Canadian dollar traded for as low as 62 U.S. cents, resulting in massive losses for the Blue Jays who collected most of their revenues in Canadian dollars but paid player salaries in U.S. dollars. When J. P. Ricciardi, then director of player development under Oakland Athletics general manager Billy Beane, was named the Blue Jays' General Manager he was expected to slash the payroll immediately in order to stem the tide of red ink. During the off-season, the team traded or let go several popular players, including Alex Gonzalez, Paul Quantrill, Brad Fullmer and closerBilly Koch to let talented youngsters such as Eric Hinske and Felipe López get a chance to develop into major leaguers.

The Blue Jays started the 2002 season with slow progress in performance. Buck Martinez was fired about a third of the way through the season, with a 20–33 record. He was replaced by third base coach Carlos Tosca, an experienced minor league manager. They went 58–51 under Tosca to finish the season 78–84. Roy Halladay was relied on as the team's ace and rose to the challenge of being the team's top pitcher, finishing the season with a 19–7 record and 2.93 ERA. The hitters were led once again by Carlos Delgado. Promising young players were assigned to key roles; starting third basemanEric Hinske won the Rookie of the Year Award at the season's conclusion, and 23-year-old centre fielderVernon Wells had his first 100 RBI season.

Team record 2002: 78 wins–84 losses, W%- 0.481, 25.5 games behind division leader, third in division

The 2003 season was a surprise to both team management and baseball analysts. After a poor April, the team had its most successful month ever in May. Carlos Delgado led the majors in RBI, followed closely by Wells. Despite their hitting successes, poor pitching continued to plague the team. Halladay was an exception, winning his first Cy Young Award, going 22–7, with a 3.25 ERA. In July, Shannon Stewart was traded to the Minnesota Twins for Bobby Kielty, another outfielder with a much lower batting average than Stewart's. Although the Jays finished in third place in their division, Delgado was second in the voting for the American League MVP Award. In the off-season, Kielty was traded to the Oakland Athletics for starterTed Lilly.

Team record 2003: 86 wins–76 losses, W%- 0.531, 15 games behind division leader, third in division

The 2004 season was a disappointing year for the Blue Jays right from the beginning. They started the season 0–8 at SkyDome and never started a lengthy winning streak. Much of that was due to injuries to All-Stars Carlos Delgado, Vernon Wells and Roy Halladay among others. Although the additions of starting pitchers Ted Lilly and Miguel Batista and reliever Justin Speier were relatively successful, veteran Pat Hentgen faltered throughout the season and retired on July 24. Rookies and minor league callups David Bush, Jason Frasor, Josh Towers and others filled the void in the rotation and the bullpen; however, inconsistent performances were evident. With the team struggling in last place and mired in a five-game losing streak, manager Carlos Tosca was fired on August 8, 2004, and was replaced by first base coach John Gibbons. Long-time first baseman Carlos Delgado became a free agent in the off-season. Nevertheless, prospects Russ Adams, Gabe Gross, and Alex Ríos provided excitement for the fans. Rookie pitchers David Bush, Gustavo Chacín and Jason Frasor also showed promise for the club's future. The Blue Jays' lone MLB All-Star Game representative was Lilly.

The Blue Jays had a good start to the 2005 season. They led the AL East from early to mid-April and held their record around .500 until late August. The Jays were hit with the injury bug when third baseman Corey Koskie broke his finger, taking him out of the lineup, but the club was pleasantly surprised with the performance of rookie call-up Aaron Hill in his stead. On July 8, just prior to the All-Star break, Blue Jays ace Roy Halladay was struck on the shin by a line drive, resulting in a fractured leg. Though Halladay's injury was hoped to be minor, the recovery process was met with constant delays, and eventually, he was out for the rest of the season. Prior to his injury, the Blue Jays were in serious wild card contention, but soon fell out of the playoff race. The team received glimpses of the future from September call-ups Guillermo Quiróz, John-Ford Griffin, and Shaun Marcum. Marcum made himself noteworthy by posting an ERA of 0.00 over 5 relief appearances and 8 innings in September. Josh Towers also stepped up, showing largely unseen potential by going 7–5 with a 2.91 ERA in the second half of the season.

Team record 2005: 80 wins–82 losses, W%- 0.494, 15 games behind division leader, third in division

In 2006, the team experienced its most successful season in years. On July 2, Troy Glaus, Vernon Wells, Roy Halladay, B. J. Ryan, and Alex Ríos were picked to represent the Blue Jays at the All-Star Game.[17] It was the largest number of Blue Jay All-Stars selected for the game since 1993. The team played well in the critical month of September, going 18–10. This, combined with the slumping of the Boston Red Sox, enabled the Blue Jays to take sole possession of second place in the American League East by the end of the season. This marked the first time that the Jays had finished above third place in their division since their World Championship season of 1993, and with the most wins since the 1998 season. On December 18, the Blue Jays announced that they had re-signed centre fielder Wells to a seven-year contract worth $126 million, which came into effect after the 2007 season.

Team record 2006: 87 wins–75 losses, W%- 0.537, 10 games behind division leader, second in division

The 2007 season was blighted by persistent injuries, with 12 Blue Jays landing on the disabled list. The most serious injury was that of B. J. Ryan, who was out for the entire season having had Tommy John surgery. Prior to the season, the team signed starting pitchers John Thomson, Tomo Ohka, and Víctor Zambrano; each of them was released before the end of the season. However, young starters Shaun Marcum and Dustin McGowan had breakout years, with 12 wins each. On June 24, McGowan pitched a complete game one-hitter. On June 28, Frank Thomas became the 21st major league player to hit 500 career home runs. Aaron Hill also had a breakout year, setting a team record for second basemen with 47 doubles.

The Blue Jays' 2008 season featured a strong pitching staff, which led the major leagues with a 3.49 ERA. For much of the season, however, the team struggled to hit home runs and drive in runs. On May 24, starter Jesse Litsch set a team record, with 38 consecutive innings without giving up a walk. On June 20, following a five-game losing streak and with the Jays in last place in the AL East, management fired John Gibbons and several members of his coaching staff, and re-hired Cito Gaston. Meanwhile, Alex Ríos had 32 stolen bases, making him the first Blue Jay with 30 since 2001. On September 5, Roy Halladay earned his 129th career win, moving him into second spot on Toronto's all-time wins list. Halladay also came second in the voting for the Cy Young Award, after posting a 20–11 record and 2.78 ERA. From August 30 to September 9, the team had a 10-game winning streak.

The 2009 season saw the addition of two new patches on the Blue Jays' uniforms: on the right arm, a bright red maple leaf (part of the Canadian flag), and on the left arm, a small black band with "TED" written on it, in reference to team owner Ted Rogers, who died in the off-season.

On opening day at the Rogers Centre, the Jays, led by Roy Halladay, beat the Detroit Tigers 12–5.[18] On June 9, with the 20th pick in the MLB draft, the Jays selected RHP Chad Jenkins, a power pitcher that has drawn comparisons to David Wells and Gustavo Chacín[19] (passing over Mike Trout who was picked 25th by the Angels). Aaron Hill and Roy Halladay both had excellent years and represented the Blue Jays at the 2009 All-Star Game in St. Louis. In mid-August, J. P. Ricciardi allowed the Chicago White Sox to claim Alex Ríos off waivers. Despite a hot start, the Jays quickly fell, including a 9-game losing streak, after starting with a 27–14 record. With two games remaining in what was a disappointing season, Ricciardi was fired on October 3. He was replaced by assistant general manager Alex Anthopoulos.[20][21]

Despite a 75-win season, the Jays saw the strong return of Aaron Hill, who won the American League Comeback Player of the Year Award and the Silver Slugger for second base. Adam Lind, who also had a strong season, earned the Silver Slugger for designated hitter. Shortstop Marco Scutaro also broke out for career highs in batting average (.282), slugging percentage (.379), at bats (574), and total bases (235).

The 2010 season was a surprising 10-win improvement over the last season. It was a career year for José Bautista, who hit 54 home runs, breaking George Bell's franchise record. In doing so, he became the 26th player to reach 50 home runs and the first since Alex Rodriguez and Prince Fielder achieved the feat in 2007. The Blue Jays also set a franchise record for the most home runs in a single season as they hit 257, 13 more than their previous record of 244 set by the 2000 Blue Jays. The Blue Jays tied the 1996 Baltimore Orioles for the third most home runs by a team in a single season. Seven players (José Bautista, Vernon Wells, Aaron Hill, Adam Lind, Lyle Overbay, John Buck, and Edwin Encarnación) hit 20 home runs or more throughout the season, tying an MLB record previously set by four teams, including the 2000 Blue Jays.

On August 7, catching prospect J. P. Arencibia made his major league debut. He went 4-for-5 with 2 home runs, including a home run hit on the first pitch he saw. The next day, starting pitcher Brandon Morrow came within one out of a no-hitter, finishing with 17 strikeouts in a complete game one-hitter.

Led by new manager John Farrell, the Blue Jays' 2011 season was up-and-down for the most part, as the team finished with a .500 record. After signing a five-year $64 million contract extension,[23] José Bautista followed up his record setting 2010 season with an arguably better season. He finished with a Major League-leading 43 home runs, along with 103 RBI, 132 walks, and a .302 average. Rookie J. P. Arencibia also had a successful year, setting a Blue Jays single-season record with 23 home runs by a catcher. In August, third base prospect Brett Lawrie made his Major League debut and hit .293 with 9 home runs, 4 triples, and 25 RBI, in just 43 games.

Starting pitcher and ace Ricky Romero had a breakout year, leading the team with 15 wins and a 2.92 ERA. He also became an All-Star for the first time in his career. The other starting pitchers were inconsistent throughout the season. Jon Rauch and Frank Francisco, both acquired in the off-season, shared the closer role.[24] They both struggled through the first half of the season, though Francisco improved in the last two months of the season, and had six saves in September.

The 2012 season was an injury-plagued year for the Blue Jays, having used 31 total pitchers, which set a franchise record.[25] In June, three starting pitchers (Brandon Morrow, Kyle Drabek, and Drew Hutchison) were lost to injury in a span of four days, two of whom required Tommy John surgery.[25] In the second half of the season, some key players in Toronto's lineup, including All-Star José Bautista, missed a significant amount of playing time due to injury, sending the team into a freefall and culminating in a 73–89 record. Despite the underachievements of Ricky Romero and Adam Lind, Casey Janssen established himself as a reliable closer (22 SV, 2.52 ERA) and Edwin Encarnación developed into one of the league's best power hitters (.280 AVG, 42 HR, 110 RBI).

The team opened on the road in Cleveland, where they beat the Indians 7–4 in 16 full innings, setting a new record for the longest opening-day game in major league history. The previous record of 15 innings had been set by the Washington Senators and Philadelphia Athletics on April 13, 1926, and tied by the Detroit Tigers and the Indians on April 19, 1960.[26]

On April 20, the Jays turned a triple play against the Kansas City Royals in a 4–3 win. It was the first triple play they turned since September 21, 1979.[27]

Despite fans and analysts high expectations,[29] the 2013 team did not live up to the pre-season predictions. Most of the regulars battled injury (Reyes broke his ankle during a steal attempt 10 games into the season and a benign tumor was removed from Cabrera's spine after the season ended) and generally underperformed.[30] One of the few bright spots was the promotion of fan favorite Munenori Kawasaki to replace Reyes. The Blue Jays also tied a franchise record with an eleven-game winning streak from June 11-23. Edwin Encarnación finished the season on the DL with a wrist injury but had great numbers (.272 AVG, 36 HR and 104 RBI) to follow up his break out 2012 season.

Team record 2013: 74 wins-88 losses, W%- 0.457, 23 games behind division leader, last in division